用近红外光谱在线监测炭布/酚醛预浸料的质量指标

用近红外漫反射法对炭布/酚醛预浸料的树脂含量、可溶树脂含量和挥发分含量进行在线监测,通过偏最小二乘法分别建立标准模型,并选择了光谱预处理方法和PLS的因子数。用近红外方法和标准方法对未知样品进行分析,通过t检验结果显示2种方法没有显著差别,利用近红外方法可同时预测3项指标,1 m in内就可分析1个样品,在生产过程中可利用近红外分析的结果调解工艺参数。研究表明,近红外分析是控制炭布/酚醛预浸料质量的有效和准确的方法。

On-line monitoring quality index of carbon/phenlic resin prepreg cloth by means of near infrared spectrum

Resin content,volatile content and soluble resin content of carbon /phenolic resin prepreg cloth were on-line monitored by means of near infrared diffused reflectance spectrum.Partial least square method was used to establish calibration models,choose spectral preprocessing methods and number of PLS factors.The t-test results for unknown sample show that there is no significant difference between the near infrared method and the standard method.The near infrared method can predict three indexes simultaneously and analyze single sample within 1 minute.The analysis results can be used to adjust processing parameters of the prepreg during manufacture.The investigation results show that near infrared diffused reflectance spectrum analysis is a kind of accurate and effective method for quality control of carbon /phenolic resin prepreg cloth.